HELP, tried going from PE5 back to PE4

I am having major issues, market is locked up, won't download anything. SD card won't mount, going to try a card reader and back it up and then re-format. None of my backups are showing in RZRecovery. I know you awesome people can help. Thanks, yes I tried wiping data and cache.
Dan

edit: Got it, re-formatted the SD card, placed a good nandroid backup on it and installed. All is good again